National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Portland, Portland International Jetport (KPWM)

Lat: 43.64°NLon: 70.3°WElev: 72ft.

A Few Clouds

57°F

14°C

Humidity 67%
Wind Speed S 5 mph
Barometer 30.29 in (1025.8 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 20 Sep 6:51 pm EDT
Extended Forecast for

Walnut Hill ME

Frost Advisory September 21, 12:00am until September 21, 08:00am
Click here for hazard details and duration
Frost Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 39. South wind around 5 mph becoming calm in the evening.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Patchy frost before 7am. Otherwise, sunny, with a high near 68. Light and variable wind becoming south 5 to 10 mph in the afternoon.

    High: 68 °F

    Patchy Frost
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 43. Southwest wind around 5 mph.

    Low: 43 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 71. Light southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 71 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 53. Southwest wind around 5 mph.

    Low: 53 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers after 3pm. Partly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers. Partly sunny, with a high near 71.

    High: 71 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 39. South wind around 5 mph becoming calm in the evening.
Sunday
Patchy frost before 7am. Otherwise, sunny, with a high near 68. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 43. Southwest wind around 5 mph.
Monday
Sunny, with a high near 71. Light southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Monday Night
Partly cloudy, with a low around 53. Southwest wind around 5 mph.
Tuesday
A 30 percent chance of showers after 3pm. Partly sunny, with a high near 79.
Tuesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 55.
Wednesday
A 40 percent chance of showers. Partly sunny, with a high near 71.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 49.
Thursday
Mostly sunny, with a high near 70.
Thursday Night
Partly cloudy, with a low around 49.
Friday
Mostly sunny, with a high near 72.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 52.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Walnut Hill ME
 43.84°N 70.25°W (Elev. 259 ft)
Last Update:
1:34 pm EDT Sep 20, 2025
Forecast Valid:
7pm EDT Sep 20, 2025-6pm EDT Sep 27, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation